Keystones — Cornerstone

Five GCSE retrieval questions · 22 January 2025 · mathsvault.uk/keystones

1. Number

8400000

Answer: 8.4 × 10⁶
2. Algebra

Collect like terms: 6x + 4y + 8x + 7y

Answer: 14x + 11y
3. Geometry

Calculate the perimeter of a right triangle with sides 12cm and 7cm

Answer: 32.9cm
4. Ratio

Find 60% of 207

Answer: 124.2
5. Statistics

Find the mean of: 3, 12, 17

Answer: 10.666666666667

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